Kenwood TK-373G, Service Manual

Page: 43 / 45

FM IF
SYSTEM
C309
Q301
–120dBm
–118dBm
–105dBm
–107dBm
–111dBm
–109dBm
–100dBm
80mV
rms
390mV
rms
Q22
C131
C242
IC16
5
4
3
41
IC14
IC11
SP
390mV
rms
260mV
rms
590mV
rms
9.5mV
rms
0.63mV
rms
-17.0dBm
IC17 DAC
12
13
ALC
COMP
SW
IDC
6
98
19
18
15
16
C243
C217
13mV
rms
4mV
rms
36mV
rms
321mV
rms
307mV
rms
301mV
rms
425mV
rms
171mV
rms
MIC
IC14
Q6
+17.9dBm
C327
-3.5dBm
RF (480.05MHz) (K2) RF (460.05MHz) (K)
RF (480.05MHz) (K2) RF (460.05MHz) (K)
RF (501.05MHz) (K3)
IF1 (49.95MHz)
IF2 (450kHz)
AF (1kHz)
IC15
AF VR
C206
C239
Q4
Q2
C30
Q3
C246
C27
C14
AF (1kHz)
RF (480.05MHz) (K2) RF (416.50MHz) (K4) RF (460.05MHz) (K)
VCO
RXLO
D10
D5
+2.5dBm
C12
Power Module
4.0W
AF (1kHz)
RX
TX
C304
Q5
+8.0dBm
C11
+
C173
Q30
+
IC4
Local Level
67
41
0
35
D6
67
Q19
Discharge pin side
Breaker
(80
°
C)
Charge pin side
Thermistor
Polyswitch
Diode
Breaker
(70
°
C)
52
KNB-14/KNB-15A (Ni-Cd BATTERY) / KNB-20N (Ni-MH BATTERY)
LEVEL DIAGRAM
TK-373G TK-373G
51
T
o
mak
e measurements in the AF section, con-
nect the A
C
le
v
el meter
. (ANT input :
-53dBm,
1kHz FM, 3kHz DEV(WIDE), SP output: 50mW) In the RF section, use a 1000pF coupling capaci- tor
. (The displa
y sho
ws the SSG input v
alue re-
quired to obtain 12dB SINAD
Without Local Le
vel.)
A
G
is set to the MIC input becomes 3kHz DEV
.
at 1kHz MOD
. (WIDE)
T
o
mak
e measurements in the AF section, con-
nect the A
C
le
v
el meter
.
In the RF section, use a 1000pF coupling ca- pacitor
.
KNB-15A SCHEMATIC DIAGRAM SPECIFICATIONS
Voltage : 7.2V (1.2V x 6)
Capacity : 1100mAh
Dimensions : 60.8W x 110.8H x 20.3D (mm)
(projections included)
Charger and charging time:
KSC-15 (normal charger), approximately 8 hours
KSC-16 (rapid charger), approximately 2 hours
KSC-24 (rapid charger), approximately 1 hour
Weight
: 210g
Discharge pin side
Breaker
(80
±
5
°
C)
Charge pin side
Thermistor
Diode
Breaker
(70
±
5
°
C)
KNB-20N SCHEMATIC DIAGRAM SPECIFICATIONS
Voltage : 7.2V (1.2V x 6)
Capacity : 1600mAh
Dimensions : 63.8W x 110.8H x 17.2D (mm)
(projections included)
Charger and charging time:
KSC-24 (rapid charger), approximately 80 minutes
Weight
: 210g
KNB-14 SCHEMATIC DIAGRAM SPECIFICATIONS
Voltage : 7.2V (1.2V x 6)
Capacity : 600mAh
Dimensions : 60.8W x 110.8H x 17.3D (mm)
(projections included)
Charger and charging time:
KSC-15 (normal charger), approximately 8 hours
KSC-16 (rapid charger), approximately 1 hour
KSC-24 (rapid charger), approximately 40 minutes
Weight
: 165g
Discharge pin side
Breaker
(80
±
5
°
C)
Charge pin side
Thermistor
Diode
Breaker
(70
±
5
°
C)